OSL component names for points, colors? (x, y, z, r, g, b)
The syntax was introduced in version 1.11 of the Open Shading Language (OSL) specification.


  OSL Language and oslc compiler:
  
  
  New syntax to reference color and point/vector/normal components as named struct components, such as C.r, C.g, C.b, or P.x, P.y, P.z. #1049 (1.11.0)
  


Blender 2.83 is using OSL 1.10.9 and thus doesn't support this syntax yet.